with particular regard to the Danish Fauna. 201 



Criocephalum, hitherto placed in the group of Hesperophani, form 

 a new closely united small group Asemini, which approaches to 

 Prionini. Hesperophani, Clyti, Obrii, and Gracilini are all to 

 be joined to Cerarnbycini. Necydalini must be dissolved, Necy- 

 dalis joining Lepturini, Molorchus Cerarnbycini, both as types 

 of distinct subtribes. Stenopterus is closely allied to Callidini. 

 Lamiini find their place at the end of the family, being con- 

 sidered more allied to Chrysomclini than any other Cerambyces; 

 and the genera of Lamiini are to be distributed between the 

 principal subgroups in a manner differing from the hitherto 

 adopted division into Lamias and Saperdse. Vesperus has to be 

 removed far from Lepturini, and to form a peculiar group of its 

 own between Asemini and Prionini, with which latter it might 

 be united but for the structure of the antennas. The genera 

 Rhagium, Toxotus, Pachyta, and Leptura must be defined in a 

 new manner, entailing a redistribution of species. Rhamnusium 

 is to be removed to Callidini from Lepturini, where authors 

 have hitherto placed it, misled, no doubt, by its deceptive ha- 

 bitus : it is, in truth, of all Callidini the one most nearly 

 approaching Lepturini. 



Amongst the crowd of external characters hitherto used for 

 the classification of the family, but, in my opinion, so floating 

 and so variously combined that they oftener mislead than guide 

 us aright in seeking definite and reliable distinctive characters 

 for systematic divisions, there is one which has done more mis- 

 chief than any other, viz. the abbreviation and narrowiug of 

 the elytra. Just as all natural groups contain genera with dif- 

 ferent position of antennas, different shape of hips, and differently 

 developed neck, so most, and perhaps all, groups contain in- 

 stances of abbreviated or narrow elytra ; even amongst Saperda 

 such may be found, viz. amongst the Indian species and those 

 from tropical Africa (S. atricornis, Pabr.). Necydalini and 

 Stenopterus have been mentioned already. Odontocera, Rhino- 

 tragus, and Oregostoma are, on the contrary, allied to Clytus, 

 excepting certain species now ranked among Oregostoma (0. al- 

 bicans, Kl., and others), but which really belong to quite distinct 

 subtribes of Cerarnbycini, seeing that their second pair of coxse 

 are quite surrounded by the mesosternum and metasternum, and 

 are not reached by the epiinera mesothoracica. In this respect 

 the species in question agree with Ibidiini, which may be cha- 

 racterized by this peculiarity of their second pair of coxse and 

 by their round anterior coxse with obtected trochanters. Among 

 Lamiini the same characters are met with in the American spe- 

 cies of Colobothea, but not in those of India, which moreover 

 differ by the shoulders of their elytra catching the epimera 

 mesothoracica by means of a process, and by legs of another type. 



